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H. W. SPENCER.

FEED WATER REGULATOR FOR STEAM BOILERS.

APPLICATION FILED MAR. 15, 1918.

Patented Aug. 12, 1919.

2 SHEETSSHEET 1.

' I l/ ll t we 0 m m M g e n M w d m w d J 4 r THE COLUMBIA PLANOGRAFH co., WASHINGTON, D. c.

H. W, SPENCER.

FEED WATER REGULATOR FOR STEAM BOiLERS.

APP ION ED MA .1

Patented Aug. 12, 1919.

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HENRY WILMOT SPENCER, OF LONDON, ENGLAND.

FEED-WATER REGULATOR FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented Aug. 12, 1919.

Application filed Marh 15, 1918. Serial No. 222,692.

To all whom it may concern:

Be it known that I, HENRY WILMOT SPENCER, a subject of the King of England, residing at 147 Queen Victoria street, London, England, (whose post-office address is 147 Queen Victoria street, London, England,) have invented certain new and useful Improvements in Feed-VVater Regnlators for Steam-Boilers, of which the following is a specification. This invention relates to apparatus for automatically controlling the supply of feed water to a steam generator or similar receptacle of the type wherein the boiler water and steam act alternately on achamber containing a vaporizable liquid the pressure from which is transmitted to a chamber where it operates a diaphragm or other suitable device for actuatingthe feed regulating valve. In such devices the object aimed at is the control of the feed regulating valve by automatic means in such a manner as to supply to the steam boiler or generator exactly the right amount of feed water from moment to moment to balance the water being evaporated into steam.

In most steam boilers and especially in the large units now coming into general use, the rate of evaporation varies throughout a wide range and the feed regulating valve must of necessity be of suflicient size to supply the maximum amount of feed water required at any given time; consequently, when the evaporation is below the normal, the feed regulating valve is only required to have a very small opening to supply sufficient feed water.

In apparatus of the type referred to and constructed in the manner described in the specifications of my United States Patents Numbers 1,047,320 and 1,150,399, the partition or heating surface of the vaporizable liquid chamber has always been arranged to offer a horizontal, level or fiat surface on its under side which is exposed alternately t0 the boiler water or steam, with the result that when the boiler water level drops slightly the whole of the surface is immediately exposed to the heating'effect of the steam. The result of this is that pressure is raised in the liquid chamber very rapidly and the feed regulating valve is opened in proportion to the rise in pressure; this may be, and often is, more than is required for the needs of the boiler at that time.

The object of my present invention is the provision of means for graduating the exposure of the heating surface of the vaporchange, instead of an abrupt change as before, from water to steam, or vice versa, on the underside of the partition or heating surface of the vaporizable liquid chamber.

This object I effectby making the underslde of the vaporizable liquid chamber so that 1ts surface is increased in the vertical direction, instead of being horizontal, level, or flat as heretofore by means of downwardly directed projecting surfaces arranged parallel to the plane containing the steam inlet from the boiler. By this construction, on a slight fall in the boiler water level only a small portion of the heating surface is exposed to the steam, the remainder being still immersed in'the water. This results in a comparatively small rise in pressure in the vaporizable liquid chamber, which pressure acting on the diaphragm causes the regulating valve to have only a proportionately small opening. If this amount of opening to feed, orincreased feed sup-ply, is suflicient and there is no further fall of the water level, the pressure will not be further increased and the regulating valve will open no farther, but if there is a still further fall of the water level a greater area of the underside of the partition will be exposed to the steam and there will be an increase of pressure in the system resulting in a further opening of the feed regulating valve.

A similar beneficial effect in assisting the closing of the feed regulating valve results when the water level is rising in the boiler.

-When the underside of the partition is a level or flat plane as heretofore, no fall in pressure in the system above it takes place until the water level rises to the partition and cuts off the steam, but when the partition is formed with an increased surface in the vertical direction in accordance with my present invention, then as soon as the lowest projection of the partition is covered or partly covered by water the area exposed to steam is reduced and pressure in the system begins to fall. Thisresults in a proportional closing of the regulating valve until by the time that the partition is wholly immersed the pressure has fallen sufliciently to allow the regulating valve to close and to cut off the feed supply; the efiect being to give a proportional feed supply to the boiler in direct relation to the amount ofvariation of the boiler water level, which is exactly what is required for thefeeding of large water tube boilers and generators of similar kind under variable conditions of load andpressure. 7

It will be obvious that if desiredithe diameter of the Vaporizable liquid chamber can be reduced so-asto provide cxactly the same area-for exposure to steam or water as before, thus tending to reducethe cost of the apparatus andthe spaceit occupies-while maintaining the requisite area of heating surface.

By way of example-my invention is il lus trated in -the accompanying drawing.

Figure 1 is a vertical sectional viewof part-0f:a feed-water regulator connected to a steam generator *and :showing one form of "my-invention applied thereto.

Figs. l-l--and 2 are vertical sections taken atright-augles to each other showing a part of the"feed water regulator detached; and

"Figs53 and 4L aresimilarviews ofa modification.

Thesame or similar parts arelettered to correspondin-all five figures.

-Referring"to Figs. 1, 1- and 2 :'A repre serits the-side of the-steam"generator, B and G the steamand .waterpipe connections to =thevaporizablediquidchamber D. The underside of the chamber D formsthe partitionor-heating surface D above which is the Vaporizable liquid in the chamber D.

In these figuresthe-underside of the partition or heating surface D is formed or provided with a number of downwardly di- 'rected ribs orprojections D which are arranged parallel to'the plane containing the taining the steam inlet B for steam inlet B so as to allow the steam to .reachthe underside of'the partition D and to act upon the parts thereof exposed between the roots of theribs or projections D In the modification shown in Figs?) and l the underside of the partition or heating urface D is curved or undulated in the vertical plane .atarightcangles to the plane conthe purpose above stated.

Having fully described my invention, What Iclaim and'desire to secure by Letters Patent is 1. A'feedwater regulator comprisinga' fitting," steam and water connections between -rected projecting partsarranged parallel to the plane'containing the steam connection with' 'the boiler;

2. A'feed water regulator comprising a fitting, steam and water connections between said fitting and a steam .boiler,:and a chamher for vaporizableiliquidswithin said fitting, said chamber having itsiheat conducting surface providedwith downwardly directed projecting parts arranged parallel to the plane containing the steam connection with the boiler andcurved or undulat-ed at right angles to the said plane.

.In testimony whereof I have hereunto set my hand, in presence of two subscribing witnesses, this fifth day of February,i19l8.

HENRY WILMOT SPENCER.

Witnesses GLAUD PoMnRoY,

ARTHUR R. WVILLIA-MSON.

i'Gopiewo! thisipatentimayibeibbtainedionfivecents each, zbyaddressingwthe wommissioner otzPatents, WashingtomiD. G. 

